It was only after he had read the papers________Mr.Gross realized the task before him was extremely difficult to complete.
| A．when | B．that | C．which | D．what |
--- Where is Jack?
--- He _________ football on the playground with those AFS students, but I am not sure.
| A．must be playing | B．must have played |
| C．may be playing | D．may have played |
Hi, Bill. I _____ you _____ in this city. How long have been here?
| A．didn’t know; were | B．don’t kow; are |
| C．haven’t known; are | D．don’t know; were |
.---Sorry, Mum. I’ve lost my pen again.
I_____it! You never remember to put your things away after using them.
| A．knew | B．know | C．have known | D．will know |
---Has Tom finished his job yet?
---I have no idea of it; he _____ it this morning.
| A．has been doing | B．had been doing | C．did | D．was doing |
I should very much like to have gone to the party, but______.
| A．I'm not invited | B．I won't be among the invited |
| C．they won't invite me | D．they didn't invite me |